Q: What is the value of the elementary charge, $$e$$, as given in the study material?

$$1.60 \times 10$$^{-19}$$\ \mathrm{C}$$

Question 1

Which of the following statements best describes the principle behind Coulomb's Law?

Accepted Answer

The force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

Question 2

What is the value of the elementary charge, $$e$$, as given in the study material?

Accepted Answer

$$1.60 	imes 10$$^{-19}$$\ \mathrm{C}$$

Question 3

Which scientist is credited with naming the two types of electric charge as positive and negative?

Accepted Answer

Benjamin Franklin

Question 4

If two point charges, $$q_1 = 2$$ \ \mu\mathrm{C}$$ and q_2$ = -3 \ \mu\mathrm{C}$$, are placed 0.5 m apart in vacuum, what is the direction of the force on $$q_1$$ due to $$q_2$$?

Accepted Answer

Attractive, directed toward $$q_2$$

Question 5

Which of the following best describes the process of charging by induction?

Accepted Answer

A charged object is brought near a neutral conductor, causing a redistribution of charges without direct contact.

Question 6

According to the study material, what is the SI unit of electric charge?

Accepted Answer

Coulomb

Question 7

Which of the following scenarios demonstrates conservation of charge?

Accepted Answer

When two objects are rubbed together, the total charge before and after remains the same.

Question 8

A plastic rod is rubbed with wool and becomes negatively charged. What happens at the atomic level?

Accepted Answer

Electrons are transferred from the wool to the rod.

Question 9

Which equation correctly represents Coulomb's Law as shown in the study material?

Accepted Answer

$$F = k_e \frac{q_1$ q_2$}{r^2$}$$

Question 10

If the distance between two point charges is doubled, how does the electrostatic force between them change?

Accepted Answer

It becomes one-fourth as large.

Question 11

Which of the following is NOT a property of electric charge as described in the study material?

Accepted Answer

Electric charge can be created or destroyed.

Question 12

A glass rod is rubbed with silk and becomes positively charged. What is the best explanation for this observation?

Accepted Answer

Electrons are transferred from the glass rod to the silk.

Question 13

Which of the following best describes the quantization of electric charge?

Accepted Answer

Electric charge exists in discrete packets, each equal to an integer multiple of the elementary charge.

Question 14

If a neutral object is brought near a negatively charged rod, what happens to the charges in the neutral object?

Accepted Answer

Electrons in the neutral object are repelled, causing a separation of charge.

Question 15

Which of the following is a correct statement about conductors and insulators?

Accepted Answer

In conductors, electrons are free to move; in insulators, electrons are bound to atoms.

Electric Charge and Coulomb’s Law (Sections 16-1 through 16-6)

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